Socket for electric lamps.



G. U. KNAUFP.

SOCKET-FOR ELECTRIC LAMPS.

APPLICATION FILED APR.22,1912.

Patented Apr. 22, 1913.

for Electric Lamps,

, these contact members llhll dhhg GEOItG-E Q KNAUFF, OF CHICAGO, ILLINOIS.

SOCKET FOB, EL'EC'ERIC LAMPS.

Specification of Letters Patent.

Patented Apr. as, rare.

Application filed April 22, 1912. serial- No. 692,283.

To all whom, it may concern:

Be it known that I, Gnoncn U. KNAUFF, a citizen of the United States, residing at the city of Chicago, in t-he county of Coolt and State of Illinois,'have invented a certain new anduseful Improvement in Sockets of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, application.

My invention relates to the class of sockets plug carrying'the wire having a detachable terminals. I

It consists of a novel method of mounting the contact members which carry the cur-.

rent from the wire terminals to the lamp or other current consuming. device, whereby are firmly supported but well insulated.

I attain these objects by the construction shown 1n the accompanying drawings, in

which Figure 1 is a partial section of a socket embodying my invention. Fig. 2 is an enlarged longitudinal section through the insulating body and the contact carriers. Fig. 3 shows an alternative arrangement of the same. Fig. 4 is a plan view of the central insulating member shown in Fig. 3.

In the drawings, 'A is a lamp having terminals B B at the bottom of its base.

0 is a cylindrical casing, preferably of nickeled brass, having diametrically opposite slots D for engaging the ends of a pro jecting pin E which passes through the lamp base. Similar slots F at the other end of the casing engage or interlock with projections G on a plug H which carries the terminals I of the wires J.

M is an insulating body,

preferably of hard rubber,

ing body. Each metal cylinder has a pair of contact plungers Q pressed outward by a spring which form a part of this ing perforations through of these plungers project.

To allow for the central enlargement on each cylinder, I referably counterbore one of the parts constituting the insulating body, as shown in Fig. 2, sothat the enlargemen' abuts or impinges against the insulating body ineach direction, thereby keeping the cylinder from moving longitudinally of the insulating body. I also preferably pr0- vide an insulating seal across the joint between the parts of the insulating body, such as a layer of insulating varnish V. In-

stead of counterboring one or both parts of the insulating body to make room for the enlarged parts of the cylindersfthe enlarged bores may be made in a separate insulating cylinder .or insulatin spacer, as shown by M',in which case eac face of M is preferably coated with an insulating varnish when the parts are being assembled. By thus making the insulating body in longitudinal sections and allowing room in termediate of the sectionsforenlargements on the metal contact carriers, I obtain a simple, cheap, well insulated and firm support for these contact carriers. j lVhile I have shown my invention as applied to a socket for an incandescent lamp,

which the stems I do not wish to be limited to this use, as it IS obvious that the device of my construction could be used for other purposes involving the carrying of current from one set of terminals to another. Neither do I wish to be limited'to the exact embodiment pictured and described. lVhat I claim as new by Letters Patent is:

1. A socket inclu ding a casing having means for anchoring a lamp and a wire terminal plug at its opposite ends respectively; a plurality of insulating members anchored Within the casing; the said members having alined' perforations parallel to their common axis; the contact members extending through the said perforations for carrying current from the terminals of the plug to the terminals of the lamp; each of the said contact members including a cylinder having an enlargement intermediate of its ends, the said enlargement abutting against adjoining ends of the insulating members. 7 l

2. A socket includinga cylindrical casing having means for anchoringa lamp and and desire to cover S, the ends of the cylinder hav- ,a" wire-terminal plng its opposite ends perforations for carrying current from the terminals of the plug to the terminals 01 the lamp; each contact niemberhaVing an enlargement intermediate of its ends impinging upon the innerends of the cylindrical members, whereby the contact members are retained. in position in the eylindri cal insulating members.

A socket including a cylindrical easing having means for anchm-ing a lamp I I oa er? and a Wire-terminal plug at its opposite ends respectively; a plurality of cylindrical members of insulating materialanchored Within the casing, the said members having ulined perforations parallel to their common axis; and contact members extending through the said perforations for carrying current from the terminals of'the plug to the terminals of the lamp; each of the said contact members includmg'a cylinder having anenlargement intermediate of its ends, the said enlargement abutting against adjoining ends of the eyllndrical members.

GEORGE 0.. KNAUFF.

Witnesses EDWARD JQKNAUFF, FILLMORE W. TODD. 

